Many activity monitors track your progress. The more versatile are the ones that also track you as you train going on runs, hiking and cycling. This is possible by having a device with GPS capabilities. GPS stands for Global Positioning System. These devices can plot your progress by time and coordinates using the satellites that orbit the earth. Devices from Garmin, Polar, Suunto and Timex to name just a few. These devices can be hand held for easy view and detailed display screens that are touchable. To GPS units that are built into a watch like the Polar M400 with a heart monitor, or Garmin Fenix 2 watch.